TWM635645U - Pump with leakproof function - Google Patents

Abstract

The invention is a pump, which includes a pump body, a spindle, a leak-proof sleeve and a liquid detection unit. The pump body has a ring wall, a head seat and a tail cover. An inner sealing wall of the head seat is covered with a ring wall; an outer sealing wall of the head seat is located on a side of the inner sealing wall opposite to the ring wall, and is interposed with the inner sealing wall to form a drainage space. The mandrel runs through the outer sealing wall and the inner sealing wall. The leak-proof sleeve is set outside the ring wall and interposed to form a sealed liquid storage space. The liquid storage space is connected to the drainage space, and the liquid detection unit measures the liquid level in the liquid storage space. In this way, when the liquid inside the pump body leaks from the place where the mandrel passes through the inner sealing wall, the leaked liquid will be sealed in the liquid storage space and will not leak out of the pump, and can be detected through the liquid detection unit. There is an internal leak.

Description

Pump with leak-proof function

The invention relates to a pump for conveying liquid.

A pump in the prior art includes a pump casing, a booster structure and a spindle. The booster structure is arranged in the pump casing; the inner end of the mandrel is connected to the booster structure in the pump casing, and the outer end passes out of the pump casing and is used to connect with a motor or other external power sources. When the pump is in operation, the motor drives the supercharging structure through the spindle, so that the supercharging structure pressurizes the liquid in the pump casing and moves the liquid in a specific direction. The supercharging structure has various structures depending on the type of the pump. Taking the centrifugal pump as an example, the supercharging structure is one or more sets of impellers, and the centrifugal force of the impeller rotation is used to pressurize the liquid in the pump casing.

In order to prevent the pressurized liquid in the pump casing from leaking from the gap between the mandrel and the pump casing to the outside of the pump casing, a shaft seal is provided where the pump casing is penetrated by the mandrel. However, under the high-speed operation of the shaft seal, its sealing performance will decline with time, resulting in the leakage of the liquid in the pump casing.

Some liquids are not allowed to leak due to their special properties, such as coolant for immersion cooling. The so-called immersion cooling is to immerse the computer server directly in the cooling liquid, and the heat generated by the components is directly transferred to the cooling liquid for heat dissipation. In this way, the server does not need to install traditional cooling fins, heat-conducting copper pipes or fans. Cooling components, so that the server can be designed extremely compact and reduce noise and maintenance requirements, but the coolant itself must have special properties such as non-conductivity and low viscosity, which makes the coolant very expensive and does not allow leakage.

However, the existing pumps cannot completely avoid liquid leakage, and it is necessary to improve them.

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a pump with a leak-proof function to prevent leakage of the transported liquid.

In order to achieve the above creative purpose, the technical means used in this creation is to design a pump with a leak-proof function, including: a pump body, which is formed with a water inlet and a water outlet, and the pump body has: a ring wall, its Surround the openings of the second ring wall that are oppositely arranged; a head seat and a tail cover, which respectively cover the openings of the second ring wall of the ring wall; the head seat has: an inner sealing wall, which covers the corresponding openings on the ring wall The ring wall is open, and a liquid space is formed around the inner sealing wall, the ring wall and the tail cap, and the liquid space communicates with the water inlet and the water outlet; an inner piercing hole is formed on the inner sealing wall; an outer The sealing wall is located on the side of the inner sealing wall opposite to the annular wall; the outer sealing wall is spaced apart from the inner sealing wall and interposed to form a drainage space; the outer sealing wall is formed with an outer penetrating hole; the The outer piercing hole and the inner piercing hole of the inner sealing wall are connected to the drainage space; a pressurization structure is arranged in the liquid space of the pump body and used to pressurize the liquid in the liquid space; a mandrel, which can rotatably pass through the outer piercing hole and the inner piercing hole of the head seat and connect to the pressurized structure; an inner shaft seal and an outer shaft seal, which are respectively arranged in the inner piercing hole and the inner piercing hole The outer piercing hole; a leak-proof sleeve, which is set outside the ring wall of the pump body, and connects the head seat and the tail cover, so that the leak-proof sleeve and the ring wall of the pump body A sealed liquid storage space is interposed between them; the liquid storage space communicates with the drainage space, and makes the liquid in the drainage space flow to the liquid storage space; A liquid detection unit is connected with the liquid storage space and is used to measure the liquid level of the liquid in the liquid storage space or to detect whether there is liquid in the liquid storage space.

When this invention is in use, the liquid to be pressurized and transported will leave the pump from the water outlet after being pressurized by the pressurization structure in the liquid space of the water inlet. The liquid space is surrounded by three structures, the inner sealing wall, the ring wall and the tail cover. The combination of these three structures is roughly equivalent to the pump casing in the prior art.

The advantages of this creation are as follows:

First, the head seat forms a drainage space through the outer sealing wall, and at the same time, a leak-proof sleeve is arranged outside the ring wall to form a sealed liquid storage space. Thereby, when the inner shaft seal arranged on the inner sealing wall leaks, the leaked liquid will flow into the liquid storage space through the drainage space, and be sealed in the liquid storage space by the outer sealing wall and the leak-proof sleeve without Leaks out of the pump and can be recycled without causing waste or polluting the environment.

Second, when the inner shaft seal leaks, the liquid detection unit or the liquid leakage detector can quickly detect the liquid in the liquid storage space, and then remind the user to repair it as soon as possible.

Furthermore, in the above-mentioned pump with leak-proof function, the pump body further has a plurality of pump body fasteners, each of the pump body fasteners penetrates the tail cover and fixes the head seat, and then clamps the ring wall between the head seat and the tail cap.

Further, in the pump with anti-leakage function, a first installation ring groove is formed on the outer sealing wall of the head seat; a second installation ring groove is formed on the tail cover; the pump body has a A first sealing ring and a second sealing ring are respectively arranged in the first installation ring groove and the second installation ring groove; the leak-proof sleeve is sleeved or passed through the outer sealing wall of the head seat, and will The first sealing ring is interposed between the first installation ring groove and the inner ring surface or the outer ring surface of the leak-proof sleeve, so that a first opening of the leak-proof sleeve is closed by the outer sealing wall; The leak-proof sleeve sleeves or passes through the tail cap, and the second sealing ring is sandwiched between the second installation ring groove and the inner or outer ring surface of the leak-proof sleeve, so that the A second opening of the leak-proof sleeve is closed by the tail cap.

Furthermore, the pump with leak-proof function, wherein the first installation ring groove of the outer seal wall of the head seat is formed on an outer ring surface of the outer seal wall; the leak-proof sleeve covers The outer sealing wall is provided, and the first sealing ring is interposed between the first installation ring groove and the inner ring surface of the leak-proof sleeve.

Further, in the pump with leak-proof function, wherein the second installation ring groove of the tail cap is formed on an inner ring surface of the tail cap; the leak-proof sleeve passes through the tail cap, and The second sealing ring is sandwiched between the second installation ring groove and the outer ring surface of the leak-proof sleeve.

Further, the pump with leak-proof function, wherein the second installation ring groove of the tail cap is formed on an outer ring surface of the tail cap; the leak-proof sleeve is sleeved on the tail cap, and The second sealing ring is sandwiched between the second installation ring groove and the inner ring surface of the leak-proof sleeve.

Further, in the pump with leak-proof function, the head seat of the pump body further has a bearing wall, and a bearing hole runs through the bearing wall; the spindle passes through the bearing hole, the outer The piercing hole and the inner piercing hole; the pump body further has a head end bearing, which is arranged in the bearing piercing hole of the bearing wall and sleeved outside the spindle.

Further, the pump with anti-leakage function, wherein the pump is a centrifugal pump, the booster structure includes at least one impeller; the water inlet of the pump body is formed in the tail cover; the water outlet is formed on the head seat.

Furthermore, in the pump with leak-proof function, the mandrel is arranged horizontally.

10: pump body

101: Liquid space

102: water inlet

103: water outlet

104: drainage space

105: liquid storage space

106: Drain hole

11: ring wall

111: opening

12: head seat

121: Inner sealing wall

1211: inner piercing hole

122: Outer sealing wall

1221: Outer piercing with holes

1222: The first installation ring groove

1223: first ring protrusion

123: Bearing wall

1231: bearing perforation

13: Tail cover

131: Sensor perforation

132: Outer cover

133: inner cover body

14: The first sealing ring

15:Second sealing ring

16: Pump body fasteners

17: Head end bearing

20: supercharged structure

21: impeller

30: mandrel

41: Inner shaft seal

42: Outer shaft seal

50: leak-proof sleeve

502: second opening

60: Liquid detection unit

13A: tail cover

132A: second ring protrusion

133A: Second installation ring groove

15A:Second sealing ring

50A: leak-proof sleeve

30B: mandrel

105C: liquid storage space

13C: tail cover

50C: leak-proof sleeve

501C: Sensor perforation

60C: Liquid detection unit

91: base

Fig. 1 is the three-dimensional appearance diagram of the first embodiment of this creation.

Fig. 2 is an exploded view of three-dimensional components of the first embodiment of the invention.

Fig. 3 is a partial perspective view of the first embodiment of the invention at another angle.

Fig. 4 is a schematic cross-sectional view of the first embodiment of the present invention, and its cross-sectional position is located in the center.

FIG. 5 is another schematic cross-sectional view of the first embodiment of the present invention, and its cross-sectional position deviates from the center to show that the drainage space communicates with the liquid storage space.

Figure 6 is a partial cross-sectional schematic diagram of the second embodiment of the invention, showing that the leak-proof sleeve is set on the second ring protrusion of the tail cap, and the second sealing ring is sandwiched between the second installation ring groove and the leak-proof sleeve between the inner rings of the barrel.

Fig. 7 is a partial cross-sectional schematic diagram of the third embodiment of the present invention, showing that the mandrel of the pump is arranged vertically, and showing a situation where the internal shaft seal leaks.

Fig. 8 is the perspective view of the fourth embodiment of the creation.

FIG. 9 is a schematic cross-sectional view of a fourth embodiment of the present invention.

Please refer to Fig. 1, Fig. 2 and Fig. 4, the pump of the invention includes a pump body 10, a booster structure 20, a mandrel 30, two shaft seals, a leak-proof sleeve 50 and a liquid detection unit 60.

The pump body 10 is a hollow body and forms a liquid space 101 , and forms a water inlet 102 and a water outlet 103 , and the water inlet 102 and the water outlet 103 communicate with the liquid space 101 . The pump body 10 has a ring wall 11 , a head seat 12 , a tail cover 13 , and preferably a first seal ring 14 , a second seal ring 15 , a plurality of pump body fasteners 16 and a head end bearing 17 .

The ring wall 11 surrounds the two ring wall openings 111 that are oppositely arranged. The head seat 12 and the tail cover 13 cover the second ring wall opening 111 of the ring wall 11 respectively. The water inlet 102 is preferably formed in the tail cover 13, and the water outlet 103 is relatively Preferably formed in header 12 . The ring wall 11 in this embodiment is not integrally formed, but is formed by sequentially connecting a plurality of rings along a central line.

Please refer to Fig. 3 to Fig. 5, the head seat 12 has an inner sealing wall 121, an outer sealing wall 122 and a bearing wall 123, and the inner sealing wall 121, the outer sealing wall 122 and the bearing wall 123 are preferably parallel interval setting. The inner sealing wall 121 covers the corresponding ring wall opening 111 on the ring wall 11, and the inner sealing wall 121 , the ring wall 11 and the tail cap 13 surround and form the aforementioned liquid space 101 . An inner through hole 1211 is formed through the inner sealing wall 121 (as shown in FIG. 4 ). In this embodiment, the head seat 12 is designed to be detachably connected to the ring wall 11 for easy maintenance and easy production, but not limited thereto, the head seat 12 and the ring wall 11 may also be designed to be integrally formed as appropriate.

The outer sealing wall 122 is located on the side of the inner sealing wall 121 opposite to the ring wall 11 (that is, the outer sealing wall 122 and the ring wall 11 are respectively located on opposite sides of the inner sealing wall 121), and the outer sealing wall 122 and the inner sealing wall 121 are arranged at intervals and A drainage space 104 is formed between them. An outer piercing hole 1221 (as shown in FIG. 4 ) is formed through the outer sealing wall 122 , and the outer piercing hole 1221 and the inner piercing hole 1211 of the inner sealing wall 121 are connected to the drainage space 104 .

In this embodiment, a first installation ring groove 1222 (as shown in FIG. 2 ) is formed on the outer sealing wall 122 , and the first sealing ring 14 (as shown in FIG. 4 ) is disposed in the first installation ring groove 1222 . Specifically, a first ring protrusion 1223 protrudes from the outer sealing wall 122 (as shown in FIG. 4 ), and a first installation ring groove 1222 is formed on the outer ring surface of the first ring protrusion 1223 .

A bearing through hole 1231 (as shown in FIG. 4 ) runs through the bearing wall 123. The head end bearing 17 (as shown in FIG. 4 ) is arranged in the bearing through hole 1231 and sleeved outside the mandrel 30. The head end bearing 17 is preferably For a ball bearing.

In this embodiment, the tail cap 13 includes an outer cover 132 and an inner cover 133 connected (as shown in FIG. 4 ), the outer cover 132 closes the second opening 502 of the leakproof sleeve 50, and the inner cover Body 133 closes ring wall opening 111 of ring wall 11 . Further, a second ring protrusion is preferably protruded on one side of the outer cover body 132 of the tail cover 13, and a second installation ring groove is formed on the inner ring surface of the second ring protrusion, and the second sealing ring 15 (as shown in Figure 4) is arranged in the second installation ring groove. The tail cover 13 is preferably formed with a sensor through hole 131, which connects the liquid storage space 105 and the external space and is used for installing the liquid detection unit 60. The opening formed by the sensor through hole 131 on the inside of the tail cover 13 is preferably Located at the lowest point of the liquid storage space 105 .

Each pump body fastener 16 penetrates the tail cover 13 and fixes the head seat 12 , and then clamps the ring wall 11 between the head seat 12 and the tail cover 13 . Each pump body fastener 16 is specifically a bolt, which passes through the tail cover 13 and screws the head seat 12 . In this embodiment, the tail cap 13 is designed to be detachably connected to the ring wall 11 to facilitate maintenance and production, but not limited thereto, the tail cap 13 and the ring wall 11 can also be designed to be integrally formed as appropriate.

The aforementioned pressurizing structure 20 is disposed in the liquid space 101 of the pump body 10 , and can pressurize the liquid in the liquid space 101 , thereby forcing the liquid to move from the water inlet 102 to the water outlet 103 . The pump in the present embodiment is a centrifugal pump, and specifically a multistage centrifugal pump, so the booster structure 20 includes multiple sets of impellers 21 arranged along a rotation axis; in other preferred embodiments, the present invention It can also be a single-stage centrifugal pump with only one set of impellers 21, or even other types of pumps.

The aforementioned mandrel 30 rotatably passes through the bearing through hole 1231 , the outer through hole 1221 and the inner through hole 1211 of the head seat 12 from outside to inside and is connected to the pressurization structure 20 . One end of the spindle 30 protruding from the pump body 10 is used to connect to an external power source (not shown) such as a motor, so as to transmit the power of the external power source to the supercharging structure 20 . The mandrel 30 is preferably arranged horizontally, but it is not limited thereto. As shown in FIG. 7 , the mandrel 30B can also be arranged vertically.

The aforementioned two shaft seals are respectively an inner shaft seal 41 (as shown in FIG. 4 ) and an outer shaft seal 42 (as shown in FIG. 4 ), and the inner shaft seal 41 is arranged in the inner piercing hole 1211 of the inner sealing wall 121 and Close the gap between the hole wall of the inner hole 1211 and the mandrel 30 to prevent the pressurized liquid in the liquid space 101 from leaking, and the outer shaft seal 42 is arranged on the outer hole 1221 of the outer sealing wall 122 and seals the outer A gap between the hole wall of the hole 1221 and the mandrel 30 is formed to prevent the liquid in the drainage space 104 from leaking to the outside.

The aforementioned anti-leakage sleeve 50 is sheathed outside the ring wall 11 of the pump body 10 . Two opposite ends of the leak-proof sleeve 50 are respectively formed with a first opening and a second opening 502 (as shown in FIG. 2 ), the first opening is sealed by the outer sealing wall 122 of the head seat 12, and the second opening 502 is sealed by the tail cap. 13 sealing, so that a sealed liquid storage space 105 is formed between the leak-proof sleeve 50 and the ring wall 11 of the pump body 10; the so-called sealing here refers to sealing the liquid inside the pump without leaking to outside space. The position of the liquid storage space 105 is lower than the drainage space 104 and And communicate with the drainage space 104 , so that the liquid in the drainage space 104 flows to the liquid storage space 105 . In this embodiment, the space formed between the leak-proof sleeve 50 and the annular wall 11 is an annular space, but the liquid storage space 105 does not refer to a complete annular space, but a low position in the annular space. In the part of the drainage space 104 (that is, the lower half of the ring). A drain hole 106 (as shown in FIG. 3 ) is formed between the inner sealing wall 121 and the outer sealing wall 122 of the head seat 12 , and the liquid storage space 105 communicates with the drainage space 104 through the drain hole 106 .

In this embodiment, one end of the leak-proof sleeve 50 is sheathed on the first ring protrusion 1223 of the outer sealing wall 122 , and the first sealing ring 14 is clamped between the first installation ring groove 1222 and the first ring groove 1222 of the leak-proof sleeve 50 . Between the inner ring surfaces, the first opening of the leak-proof sleeve 50 is closed by the outer sealing wall 122 . In other preferred embodiments, the leak-proof sleeve 50 can also be designed to pass through the outer sealing wall 122 and sandwich the first sealing ring 14 between the first installation ring groove 1222 and the outside of the leak-proof sleeve 50 between the torus.

The other end of the leak-proof sleeve 50 preferably passes through the second ring protrusion of the tail cap 13, and the second sealing ring 15 is sandwiched between the second installation ring groove and the outer ring surface of the leak-proof sleeve 50 , and then the second opening 502 of the leakproof sleeve 50 is closed by the tail cap 13 . Please refer to FIG. 6, in other preferred embodiments, the leak-proof sleeve 50A can also be designed to be sleeved outside the second ring protrusion 132A of the tail cap 13A and the second sealing ring 15A is clamped on the second ring protrusion 132A. The second installation ring groove 133A and the inner ring surface of the leak-proof sleeve 50A have an aesthetic function.

In this embodiment, the leak-proof sleeve 50 is designed to be detachably connected with the headstock 12 and the tail cover 13 to facilitate maintenance and easy production, but it is not limited thereto, and the leak-proof sleeve 50 can also be designed to be compatible with the situation. The head seat 12 or the tail cover 13 are integrally formed.

The aforementioned liquid detection unit 60 is preferably a liquid level sensing device, which is arranged in the sensor perforation 131 of the tail cover 13. When the inner shaft seal 41 leaks, the liquid detection unit 60 can detect The liquid level of the liquid in the liquid storage space 105 is detected to remind the user to arrange maintenance in time. In other preferred embodiments, the liquid detection unit 60 can also be a liquid leakage detector, which detects whether the inner shaft seal 41 is leaking by detecting whether there is liquid in the liquid storage space 105 .

When the invention is in use, the water inlet 102 and the water outlet 103 are connected to the fluid pipeline (not shown in the figure) to be pressurized, and the spindle 30 is connected to the motor (not shown in the figure) to make the pump work. When leakage occurs at the inner shaft seal 41 due to natural aging or other factors, the leaked liquid will flow down into the liquid storage space 105 through the drainage space 104 and be detected by the liquid detection unit 60, so the user can use By observing the liquid detection unit 60 to confirm the leakage condition and roughly know the leakage speed, it is beneficial to timely arrange maintenance. The liquid in the liquid storage space 105 can also be recovered during maintenance.

Please refer to Fig. 8 and Fig. 9, the fourth embodiment of the present invention is roughly the same as the first embodiment, the difference is that a connected liquid storage space 105C is formed through the wall of the leakproof sleeve 50C of the fourth embodiment sensor perforations 501C, that is to say, the total number of sensor perforations 131C is two, and the liquid detection unit 60C can be disposed on the tail cap 13C or the leak-proof sleeve 50C as appropriate.

In this embodiment, the liquid detection unit 60C is installed in the sensor perforation 501C of the leak-proof sleeve 50C, whereby when the pump is installed on a non-horizontal base 91, the sensor on the leak-proof sleeve 50C The through hole 501C is located at the lowest part of the liquid storage space 105C, so as to ensure that the liquid detection unit 60C can detect the liquid correctly.

The sensor through holes 131C and 501C in this embodiment can also be used as liquid recovery holes. In other preferred embodiments, a liquid recovery hole (not shown in the figure) is additionally formed on the pump, which passes through the outer wall of the pump and communicates with the liquid storage space 105C. The liquid recovery hole is usually closed with a plug, and the liquid recovery hole can be opened to recover the liquid in the liquid storage space 105C when the liquid needs to be recovered.

To sum up, in the present invention, the drainage space 104 is formed by setting the outer sealing wall 122 , and the sealed liquid storage space 105 is formed by setting the leakproof sleeve 50 . In this way, when the inner shaft seal 41 leaks, the leaked liquid will be sealed in the liquid storage space 105 without leaking out of the pump, and can be recovered without causing waste or polluting the environment. At the same time, the liquid detection unit 60 can detect internal leakage, and then remind the user to repair as soon as possible.

The above description is only a preferred embodiment of this creation, and does not impose any formal restrictions on this creation. Although this creation has been disclosed as above with a preferred embodiment, it is not used to limit this creation. Anyone in the technical field has Ordinary knowledgeable persons, without departing from the scope of this creative technical solution, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes. The technical essence of the creation Any simple modification, equivalent change and modification made to the above embodiments still belong to the scope of the technical solution of the creation.

102: water inlet

103: water outlet

12: head seat

122: Outer sealing wall

13: Tail cover

16: Pump body fasteners

30: mandrel

50: leak-proof sleeve

60: Liquid detection unit

Claims (9)

A pump with anti-leakage function, comprising: a pump body, which forms a water inlet and a water outlet, the pump body has: a ring wall, which surrounds the openings of the two ring walls that are oppositely arranged; a head seat and a tail cover , which cover the openings of the two ring walls of the ring wall respectively; A liquid space is formed around the cover, and the liquid space communicates with the water inlet and the water outlet; an inner piercing hole is formed through the inner sealing wall; an outer sealing wall is located on the side of the inner sealing wall opposite to the ring wall ; the outer sealing wall and the inner sealing wall are arranged at intervals and interposed to form a drainage space; an outer piercing hole is formed on the outer sealing wall; the outer piercing hole and the inner piercing hole of the inner sealing wall are connected The drainage space; a pressurization structure, which is arranged in the liquid space of the pump body, and is used to pressurize the liquid in the liquid space; a mandrel, which rotatably passes through the outer part of the head seat The hole and the inner piercing hole are connected to the supercharging structure; an inner shaft seal and an outer shaft seal are respectively arranged in the inner piercing hole and the outer piercing hole; a leak-proof sleeve is sleeved in the outside the ring wall of the pump body, and connect the head seat and the tail cover, so that a sealed liquid storage space is formed between the leak-proof sleeve and the ring wall of the pump body; the liquid storage space communicate with the drainage space, and make the liquid in the drainage space flow to the liquid storage space; a liquid detection unit, which is connected to the liquid storage space and used to measure the liquid level of the liquid in the liquid storage space or to detect Test whether there is liquid in the liquid storage space. The pump with leak-proof function as described in Claim 1, wherein the pump body further has a plurality of pump body fasteners, each of the pump body fasteners penetrates the tail cover and fixes the head seat, and then clamps the ring wall between the head seat and the tail cap. The pump with leak-proof function as described in claim 2, wherein a first installation ring groove is formed on the outer sealing wall of the head seat; a second installation ring groove is formed on the tail cover; the pump body has a A first sealing ring and a second sealing ring are respectively arranged in the first installation ring groove and the second installation ring groove; the leak-proof sleeve is sleeved or passed through the outer sealing wall of the head seat, and will The first sealing ring is sandwiched between the first installation ring groove and the inner ring surface or the outer ring surface of the leak-proof sleeve, so that a first opening of the leak-proof sleeve is closed by the outer sealing wall; The leak-proof sleeve sleeves or passes through the tail cap, and the second sealing ring is sandwiched between the second installation ring groove and the inner or outer ring surface of the leak-proof sleeve, so that the A second opening of the leak-proof sleeve is closed by the tail cap. The pump with leak-proof function as described in claim 3, wherein the first installation ring groove of the outer sealing wall of the head seat is formed on an outer ring surface of the outer sealing wall; the leak-proof sleeve covers The outer sealing wall is provided, and the first sealing ring is interposed between the first installation ring groove and the inner ring surface of the leak-proof sleeve. The pump with leak-proof function as described in claim 4, wherein the second installation ring groove of the tail cap is formed on an inner ring surface of the tail cap; the leak-proof sleeve passes through the tail cap, and The second sealing ring is sandwiched between the second installation ring groove and the outer ring surface of the leak-proof sleeve. The pump with leak-proof function as described in claim 4, wherein the second installation ring groove of the tail cap is formed on an outer ring surface of the tail cap; the leak-proof sleeve is sleeved on the tail cap, and The second sealing ring is sandwiched between the second installation ring groove and the inner ring surface of the leak-proof sleeve. The pump with leak-proof function as described in any one of claims 1 to 6, wherein The head seat of the pump body further has a bearing wall, and a bearing hole runs through the bearing wall; the mandrel runs through the bearing hole, the outer hole and the inner hole in sequence; the pump body further has a head An end bearing is arranged in the bearing through hole of the bearing wall and sleeved outside the spindle. The pump with leak-proof function as described in any one of Claims 1 to 6, wherein the pump is a centrifugal pump, and the booster structure includes at least one impeller; the water inlet of the pump body is formed at the tail Cover; the water outlet is formed on the head seat. The leak-proof pump according to any one of claims 1 to 6, wherein the mandrel is arranged horizontally.

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